Establish the erosive wear mechanism of drilling string in air drilling and put forward that erosion wear is a substantial cause to promote drill string failure.
初步确立了空气钻井钻柱冲蚀磨损机理，提出钻屑冲蚀是促使钻具失效的一项重要原因。
2
A comparison with the traditional method of drilling shows that the seismic attribute method can locate the coal erosion boundary accurately.
与传统钻探解释方法相比，地震属性方法能够更准确地圈定煤层冲刷带的边界。
3
Based on data review, the corrosion and erosion of metal drilling tools in under-balanced drilling are analyzed, including affecting factors, composition and application of corrosion inhibitors.